JP2005120439A - Vacuum carburizing furnace - Google Patents

Vacuum carburizing furnace Download PDF

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JP2005120439A
JP2005120439A JP2003357352A JP2003357352A JP2005120439A JP 2005120439 A JP2005120439 A JP 2005120439A JP 2003357352 A JP2003357352 A JP 2003357352A JP 2003357352 A JP2003357352 A JP 2003357352A JP 2005120439 A JP2005120439 A JP 2005120439A
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chamber
carburizing
diffusion
furnace
vacuum
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Tetsuji Machi
哲司 町
Yoshiyuki Iwagami
良行 岩上
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Nachi Fujikoshi Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a furnace capable of covering the range from mass production to little production and from a continuous furnace to a batch-wise furnace by one furnace and conserved energy and changing a work to be worked. <P>SOLUTION: In a vacuum carburizing furnace for an iron alloy component comprising: a first chamber as a preheating chamber; a second chamber as a temperature rising chamber; a third chamber as a carburizing chamber; a fourth chamber as a diffusing chamber (the carburizing chamber and the diffusing chamber may be a carburizing-diffusing chamber); and a fifth chamber as a temperature dropping chamber, at least any one chamber combines at least two functions among preheating, temperature rising, carburizing, diffusing and temperature dropping. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、昇温室、浸炭室及び拡散室又は浸炭兼拡散室、降温室及び焼入れ室を含む鉄合金部品のストレートスルー型の真空浸炭炉に関する。   The present invention relates to a straight-through vacuum carburizing furnace for iron alloy parts including a temperature raising chamber, a carburizing chamber and a diffusion chamber or a carburizing / diffusion chamber, a descending greenhouse and a quenching chamber.

従来の真空浸炭炉としては、例えば特許文献１に示すようなバッチ式ストレートスルー型の真空浸炭炉があるが、浸炭処理に数時間が必要であり、大量生産時には複数以上の炉を設置する必要があった。従来の大量生産用の連続ガス浸炭炉は昇温、浸炭、拡散、降温の各工程が真空シールにより仕切られた独立した各室で行われる構造であり、トレイ又はバスケットは、各室全部を通過しないと浸炭が行われない。
特公平２−４８６１８号公報 第３図 特開２０００−３５５７５５ 図１、請求項１ As a conventional vacuum carburizing furnace, for example, there is a batch type straight-through type vacuum carburizing furnace as shown in Patent Document 1, but several hours are required for carburizing treatment, and it is necessary to install a plurality of furnaces in mass production. was there. A conventional continuous gas carburizing furnace for mass production has a structure in which each process of heating, carburizing, diffusion, and cooling is performed in independent chambers separated by a vacuum seal, and the tray or basket passes through all the chambers. Otherwise, carburization will not occur.
Japanese Examined Patent Publication No. 2-48618 Figure 3 JP-A-2000-355755 FIG.

かかる従来の大量生産用の連続ガス浸炭炉は、最大生産量に対応したサイクルタイムでトレイ又はバスケットが挿入、排出されるようにトレイ数、炉長が決定されている。このため従来の連続ガス浸炭炉では、少量生産時も大量生産時も同一サイクルタイムでありエネルギー等の無駄が生じることと、対象ワークの変更に対し条件の変更が生じたときは炉内のワークを払い出した後条件設定変更する必要がありフレキシビリティに欠けた。特許文献２では、従来の昇温室、浸炭室、拡散室、降温室及び焼入れ室を含む鉄合金部品の真空浸炭炉において、拡散室は浸炭室と兼用の浸炭兼拡散室とし、浸炭兼拡散室で真空浸炭処理及び拡散処理を行うことにより、広い範囲の浸炭温度領域にわたって浸炭深さの変化に効率的に対応し若干フレキシビリティを増した真空浸炭炉を提案している。   In such a conventional continuous gas carburizing furnace for mass production, the number of trays and the length of the furnace are determined so that trays or baskets are inserted and discharged at a cycle time corresponding to the maximum production amount. For this reason, in conventional continuous gas carburizing furnaces, the same cycle time is used for both small and mass production, and energy is wasted, and when conditions change in response to changes in the target work, the work in the furnace After paying out, it was necessary to change the condition setting and lacked flexibility. In Patent Document 2, in a conventional vacuum carburizing furnace for iron alloy parts including a heating chamber, a carburizing chamber, a diffusion chamber, a descending chamber, and a quenching chamber, the diffusion chamber is a carburizing and diffusion chamber that is also used as a carburizing chamber. We have proposed a vacuum carburizing furnace that can handle the changes in carburizing depth efficiently over a wide range of carburizing temperature ranges and increase the flexibility slightly by performing vacuum carburizing and diffusion processes.

本発明の課題は、炉一基で連続炉からバッチ式炉まで、大量から少量生産までカバーでき、省エネルギーに貢献し、かつ対象ワークの変更も最小時間で可能な炉を提供することにある。   An object of the present invention is to provide a furnace that can cover a large-scale production to a small-scale production from a continuous furnace to a batch-type furnace with a single furnace, contributes to energy saving, and can change a target work in a minimum time.

このため本発明の第１発明は、予熱室、昇温室、浸炭室及び拡散室又は浸炭兼拡散室、降温室及び焼入れ室を含む鉄合金部品の真空浸炭炉において、前記焼入れ室以外の少なくともいずれかの１室は、予熱、昇温、浸炭、拡散及び降温の各機能を少なくとも２以上兼用するようにしたことを特徴とする真空浸炭炉を提供することにより上記課題を解決した。
前記予熱室又は昇温室は予熱及び昇温の各機能を兼用し、前記昇温室、浸炭室及び拡散室又は浸炭兼拡散室、及び降温室の少なくともいずれかの１室は浸炭、拡散及び降温の各機能を少なくとも２以上兼用するようにした真空浸炭炉あってもよい。 For this reason, the first invention of the present invention is a vacuum carburizing furnace for iron alloy parts including a preheating chamber, a temperature raising chamber, a carburizing chamber and a diffusion chamber or a carburizing / diffusion chamber, a descending greenhouse and a quenching chamber, and at least any one other than the quenching chamber One of the chambers has solved the above problems by providing a vacuum carburizing furnace characterized in that at least two functions of preheating, temperature raising, carburizing, diffusion, and temperature lowering are combined.
The preheating chamber or the temperature raising chamber has both functions of preheating and temperature raising, and at least one of the temperature raising chamber, the carburizing chamber and the diffusion chamber or the carburizing / diffusion chamber, and the temperature lowering chamber is carburizing, diffusion and temperature lowering. There may be a vacuum carburizing furnace in which at least two functions are combined.

本発明の第２発明は、昇温室、浸炭室及び拡散室又は浸炭兼拡散室、降温室及び焼入れ室を含む鉄合金部品の真空浸炭炉において、前記焼入れ室以外の少なくともいずれかの１室は昇温、浸炭、拡散及び降温の各機能を少なくとも２以上兼用するようにしたことを特徴とする真空浸炭炉を提供することにより上記課題を解決した。
前記昇温室は予熱及び昇温の各機能を兼用しかつ複数以上のトレイ又はバスケットを挿入可能にし、前記昇温室、浸炭室及び拡散室又は浸炭兼拡散室、及び降温室の少なくともいずれかの１室は浸炭、拡散及び降温の各機能を少なくとも２以上兼用するようにした真空浸炭炉あってもよい。 The second invention of the present invention is a vacuum carburizing furnace for iron alloy parts including a temperature raising chamber, a carburizing chamber and a diffusion chamber or a carburizing / diffusion chamber, a descending chamber and a quenching chamber, and at least one of the chambers other than the quenching chamber is The above-mentioned problems have been solved by providing a vacuum carburizing furnace characterized in that at least two functions of temperature raising, carburizing, diffusion, and temperature lowering are combined.
The temperature raising chamber has both preheating and temperature raising functions, and a plurality of trays or baskets can be inserted. At least one of the temperature raising chamber, the carburizing chamber, the diffusion chamber, the carburizing / diffusion chamber, and the descending greenhouse is provided. The chamber may be a vacuum carburizing furnace in which at least two functions of carburizing, diffusion, and cooling are combined.

かかる構成により、本発明の真空浸炭炉による真空浸炭焼入れは、真空浸炭炉としての真空浸炭の高温処理による生産性の向上とＣＯ2 の排出なしの特徴に加え、真空浸炭炉の各室に予熱、昇温、浸炭、拡散及び降温の各機能を少なくとも２以上兼用するようにしたことにより、真空浸炭炉のうちの１室のみで、又は２室以上のみで、上記各機能を実施し、兼用されたあとに残る各室は上記各機能を停止するので、大量生産時は各室本来の工程で操業し、中・少量生産時は生産量に応じた室を選択し操業させることが可能となり、炉一基で連続炉からバッチ式炉まで、大量から少量生産までカバーでき、生産量の変動、対象ワークの切換等に無駄がなく処理が可能になり、かつ消費エネルギーも最小限に抑えることが可能になった。又対象ワークの変更に対しても炉内ワークをすべて払出すことなく、条件変更が可能でありロスタイムが最小限にすることができフレキシビリティがある真空浸炭炉を提供するものとなった。 With such a configuration, the vacuum carburizing and quenching by the vacuum carburizing furnace of the present invention is preheated in each chamber of the vacuum carburizing furnace in addition to the improvement in productivity by high-temperature processing of the vacuum carburizing furnace as a vacuum carburizing furnace and the feature of no CO 2 emission. By using at least two or more functions of temperature raising, carburizing, diffusion, and temperature lowering, the above functions are implemented in only one or more of the vacuum carburizing furnaces. Each room that remains after the operation is stopped stops the above functions, so that it is possible to operate in the original process of each room during mass production, and to select and operate a room according to the production volume during medium and small volume production. A single furnace can cover a wide range of production from small to large, from continuous to batch-type furnaces, making it possible to process production without changing waste, changing the target workpiece, and minimizing energy consumption. Became possible. In addition, the present invention provides a flexible vacuum carburizing furnace that can change the conditions without changing all the workpieces in the furnace even when the target workpiece is changed, and can minimize the loss time.

本発明を実施するための最良の形態の一例を図１、図２を参照して説明する。図１は本発明の第１発明を実施するための最良の形態に使用する、チャージのサイクルタイム（以下サイクルタイムという）が１〜８時間くらい生産量に変動がある場合の、真空浸炭炉の構成を示すブロック図、図２は図１の構成の真空浸炭炉の大まかなサイクルタイムと使用する各室の一例を示す。本発明の第１発明を実施するための最良の形態は、図１に示すように、予熱室である１室、昇温室である２室、浸炭室である３室、拡散室である４室（浸炭室及び拡散室は、浸炭兼拡散室であってもよい）、降温室である５室及び焼入れ室６を含む鉄合金部品の真空浸炭炉において、焼入れ室６以外の少なくともいずれかの１室は、予熱、昇温、浸炭、拡散及び降温の各機能を少なくとも２以上兼用するようにしたことを特徴とする真空浸炭炉である。
予熱室である１室又は昇温室である２室は予熱及び昇温の各機能を兼用し、昇温室である２室、浸炭室である３室及び拡散室である４室、及び降温室である５室の少なくともいずれかの１室は浸炭、拡散及び降温の各機能を少なくとも２以上兼用するようにした真空浸炭炉であってもよい。 An example of the best mode for carrying out the present invention will be described with reference to FIGS. FIG. 1 shows a vacuum carburizing furnace used in the best mode for carrying out the first invention of the present invention when the charge cycle time (hereinafter referred to as the cycle time) varies in production amount by about 1 to 8 hours. FIG. 2 is a block diagram showing the configuration, and FIG. 2 shows an example of the rough cycle time of the vacuum carburizing furnace having the configuration shown in FIG. As shown in FIG. 1, the best mode for carrying out the first invention of the present invention is as follows: one preheating chamber, two heating chambers, three carburizing chambers, and four diffusion chambers. (The carburizing chamber and the diffusion chamber may be a carburizing / diffusion chamber) In a vacuum carburizing furnace for iron alloy parts including five chambers and a quenching chamber 6 which are descending greenhouses, at least one of the other than the quenching chamber 6 The chamber is a vacuum carburizing furnace characterized by having at least two or more functions of preheating, temperature raising, carburizing, diffusion and temperature lowering.
One room that is a preheating chamber or two rooms that are heating chambers also have functions of preheating and heating, and are two chambers that are heating chambers, three chambers that are carburizing chambers, four chambers that are diffusion chambers, and a descending greenhouse. At least one of the five chambers may be a vacuum carburizing furnace in which at least two functions of carburizing, diffusion, and temperature lowering are combined.

図２の (1)サイクルタイム１〜２時間は、比較的浅い浸炭で生産量が多い場合（チャージのサイクルタイムが短い場合）で、１室の予熱室は予熱工程、２室の昇温室は昇温工程、３室の浸炭室は浸炭工程、４室の拡散室は拡散工程、５室の降温室は降温工程とそれぞれの工程を担って全室操業して処理を実施する。この場合、焼入れ室６を含め各室の処理時間をそれぞれ１時間とすると、サイクルタイムが１時間の１チャージのトレイ又はバスケットの全処理時間は６時間となり、サイクルタイムが２時間の１チャージのトレイ又はバスケットの全処理時間も６時間となる。
(2) 〜(4) は生産量が少ない場合（チャージのサイクルタイムが長い場合）はサイクルタイムに応じ各室で複数工程を処理する。
図２の(2) はサイクルタイムは３時間の場合で、３室〜５室のみを使用し、３室では予熱工程と昇温工程とを１室で兼用して行い、４室では浸炭工程と拡散工程とを１室で兼用して行い、５室では降温工程を実施する。この場合、１室、２室は各室の搬送ローラ８のみを動作させ、トレイまたはバスケットの搬送のみを行い、温度管理、圧力管理は行わず各機能を停止する。この場合、焼入れ室６を含め各室の処理時間をそれぞれ１時間とすると、サイクルタイムが３時間の１チャージのトレイ又はバスケットの全処理時間は６時間となり、６時間内に２チャージのトレイ又はバスケットが処理される。
図２の(3) はサイクルタイムは６時間の場合で、４室、５室のみを使用し、４室では予熱工程と昇温工程とを１室で兼用して行い、５室では浸炭工程、拡散工程及び降温工程とを１室で兼用して実施する。この場合、１室〜３室は各室の搬送ローラ８のみを動作させ、トレイまたはバスケットの搬送のみを行い、温度管理、圧力管理は行わず各機能を停止する。この場合、焼入れ室６を含め各室の処理時間をそれぞれ１時間とすると、サイクルタイムが６時間の１チャージのトレイ又はバスケットの全処理時間は６時間となる。
図２の(4) はサイクルタイムは８時間の場合で、５室のみを使用し、５室では予熱工程、昇温工程、浸炭工程、拡散工程及び降温工程とを１室で兼用して実施する。この場合、１室〜４室は各室の搬送ローラ８のみを動作させ、トレイまたはバスケットの搬送のみを行い、温度管理、圧力管理は行わず各機能を停止する。この場合、焼入れ室６を含め各室の処理時間をそれぞれ１時間とすると、サイクルタイムが８時間の１チャージのトレイ又はバスケットの全処理時間は６時間となる。 In Fig. 2, (1) The cycle time is 1 to 2 hours when the carburization is relatively shallow and the production volume is large (when the charge cycle time is short). The temperature raising process, the three carburizing chambers carry out the carburizing process, the four diffusion chambers carry out the diffusion process, and the five lowering greenhouses carry out the temperature lowering process and carry out the respective processes and carry out the processing. In this case, assuming that the processing time of each chamber including the quenching chamber 6 is 1 hour, the total processing time of the tray or basket for 1 charge with a cycle time of 1 hour is 6 hours, and that for 1 charge with a cycle time of 2 hours. The total processing time for the tray or basket is also 6 hours.
In (2) to (4), when the production volume is small (when the charge cycle time is long), multiple processes are processed in each chamber according to the cycle time.
(2) in Fig. 2 shows the case where the cycle time is 3 hours. Only 3 to 5 rooms are used. In the 3 rooms, the preheating process and the temperature raising process are combined in one room, and in the 4 rooms, the carburizing process. And the diffusion process are performed in one room, and the temperature lowering process is performed in five rooms. In this case, in each of the first and second chambers, only the transport roller 8 of each chamber is operated, only the tray or basket is transported, and each function is stopped without performing temperature management and pressure management. In this case, assuming that the processing time of each chamber including the quenching chamber 6 is 1 hour, the total processing time of a 1-charge tray or basket with a cycle time of 3 hours is 6 hours. The basket is processed.
(3) in Fig. 2 shows a cycle time of 6 hours. Only 4 and 5 rooms are used. In 4 rooms, the preheating process and the temperature raising process are combined in one room. The diffusion process and the temperature lowering process are performed in one room. In this case, in the first to third chambers, only the transport roller 8 of each chamber is operated, only the tray or basket is transported, and each function is stopped without performing temperature management and pressure management. In this case, assuming that the processing time of each chamber including the quenching chamber 6 is 1 hour, the total processing time of a one-charge tray or basket having a cycle time of 6 hours is 6 hours.
(4) in Fig. 2 shows a cycle time of 8 hours, using only 5 chambers. In 5 chambers, the preheating process, heating process, carburizing process, diffusion process and cooling process are performed in one room. To do. In this case, in the first to fourth chambers, only the transport roller 8 of each chamber is operated, only the tray or basket is transported, and each function is stopped without performing temperature management and pressure management. In this case, assuming that the processing time of each chamber including the quenching chamber 6 is 1 hour, the total processing time of a one-charge tray or basket having a cycle time of 8 hours is 6 hours.

図３は本発明の第２発明を実施するための最良の形態に使用する、チャージのサイクルタイム（以下サイクルタイムという）が３〜８時間くらい生産量に変動がある場合の、真空浸炭炉の構成を示すブロック図で、真空浸炭炉は１室〜３室及び焼入れ室６を含む。図４は図３の構成の真空浸炭炉の大まかなサイクルタイムと使用する各室の一例を示す。
図４の (1)サイクルタイム１〜２時間は、生産量が多い場合（チャージのサイクルタイムが短い場合）で、１室の予熱室は予熱工程及び昇温工程を兼用して実施し、２室の浸炭兼拡散室は浸炭工程及び拡散工程を兼用して実施し、３室の降温室は降温工程を実施する。この場合、焼入れ室６を含め各工程の処理時間を１時間とすると、サイクルタイムが１時間の１チャージのトレイ又はバスケットの全処理時間は６時間となり、サイクルタイムが２時間の１チャージのトレイ又はバスケットの全処理時間も６時間となる。
図４の(2) のサイクルタイムは３時間の場合で、２室及び３室のみを使用し、２室では予熱工程と昇温工程とを１室で兼用して行い、３室では浸炭工程、拡散工程及び降温工程を１室で兼用して実施する。この場合、１室、４室及び５室は各室の搬送ローラ８のみを動作させ、トレイまたはバスケットの搬送のみを行い、温度管理、圧力管理は行わず各機能を停止する。この場合、焼入れ室６を含め各工程の処理時間を１時間とすると、サイクルタイムが３時間の１チャージのトレイ又はバスケットの全処理時間は６時間となり、６時間内に２チャージのトレイ又はバスケットが処理される。
図４の(3) のサイクルタイムは６時間の場合で、３室のみを使用し、３室では予熱工程、昇温工程、浸炭工程、拡散工程及び降温工程とを１室で兼用して実施する。この場合、１室、２室、４室及び５室は各室の搬送ローラ８のみを動作させ、トレイまたはバスケットの搬送のみを行い、温度管理、圧力管理は行わず各機能を停止する。この場合、焼入れ室６を含め各工程の処理時間を１時間とすると、サイクルタイムが６時間の１チャージのトレイ又はバスケットの全処理時間は６時間となる。 FIG. 3 shows a vacuum carburizing furnace used in the best mode for carrying out the second invention of the present invention, when the charge cycle time (hereinafter referred to as cycle time) varies in production amount by about 3 to 8 hours. In the block diagram showing the configuration, the vacuum carburizing furnace includes one to three chambers and a quenching chamber 6. FIG. 4 shows an example of the rough cycle time of the vacuum carburizing furnace configured as shown in FIG. 3 and each chamber used.
In Fig. 4, (1) The cycle time is 1 to 2 hours when the production volume is large (when the charge cycle time is short), and one preheating chamber is used for both the preheating process and the temperature raising process. The carburizing / diffusion chamber of the room is used for both the carburizing process and the diffusion process, and the temperature lowering process is performed for the three-room greenhouse. In this case, if the processing time of each process including the quenching chamber 6 is 1 hour, the total processing time of a 1-charge tray or basket with a cycle time of 1 hour is 6 hours, and the 1-charge tray with a cycle time of 2 hours. Or the total processing time of the basket is also 6 hours.
The cycle time of (2) in Fig. 4 is 3 hours. Only 2 and 3 rooms are used. In the 2 rooms, the preheating process and the temperature raising process are combined in one room, and in the 3 rooms, the carburizing process. The diffusion process and the temperature lowering process are performed in one room. In this case, the first chamber, the fourth chamber, and the fifth chamber operate only the transport roller 8 of each chamber, perform only the tray or basket transport, stop the functions without performing the temperature management and the pressure management. In this case, if the processing time of each process including the quenching chamber 6 is 1 hour, the total processing time of a 1-charge tray or basket with a cycle time of 3 hours is 6 hours, and a 2-charge tray or basket within 6 hours. Is processed.
The cycle time of (3) in Fig. 4 is 6 hours, and only 3 rooms are used. In 3 rooms, the preheating process, heating process, carburizing process, diffusion process and cooling process are performed in one room. To do. In this case, in the first chamber, the second chamber, the fourth chamber, and the fifth chamber, only the transport roller 8 of each chamber is operated, only the tray or basket is transported, and each function is stopped without performing temperature management and pressure management. In this case, assuming that the processing time of each process including the quenching chamber 6 is 1 hour, the total processing time of a one-charge tray or basket having a cycle time of 6 hours is 6 hours.

図５は本発明の図３とは異なる本発明を実施するための最良の形態に使用する、大形ワークまたは肉厚ワークで深い浸炭を要求される場合の、真空浸炭炉の構成を示すブロック図で、真空浸炭炉は１室〜４室を含む。１室は複数のトレイまたはバスケットの挿入が可能な構成とし、予熱・昇温工程と浸炭拡散のパルス浸炭ができる構造である。２〜４室は昇温、浸炭、拡散、降温の機能を兼用する。図６は図５の構成の真空浸炭炉の大まかなサイクルタイムと使用する各室の一例を示し、２室及び３室がそれぞれ浸炭拡散のパルス浸炭を行うようにした。浸炭拡散のパルス浸炭を繰り返すので、大形ワークまたは肉厚ワークで深い浸炭を要求される真空浸炭に適する。
図７は図５の構成の真空浸炭炉の大まかなサイクルタイムと使用する別の一例を示し、３室のみ浸炭拡散のパルス浸炭を行うようにした。３室で浸炭拡散のパルス浸炭を繰り返すので、比較的大形ワーク又は肉厚ワークの真空浸炭に適する。
〔発明を実施するための最良の形態の効果〕 FIG. 5 is a block diagram showing the configuration of a vacuum carburizing furnace when deep carburizing is required for a large workpiece or a thick workpiece used in the best mode for carrying out the present invention different from FIG. 3 of the present invention. In the figure, the vacuum carburizing furnace includes one to four chambers. One chamber has a structure in which a plurality of trays or baskets can be inserted, and has a structure capable of pulse carburizing for preheating / heating process and carburizing diffusion. The 2nd to 4th chambers share the functions of heating, carburizing, diffusing and cooling. FIG. 6 shows an example of the rough cycle time of the vacuum carburizing furnace configured as shown in FIG. 5 and each chamber to be used. Each of the two chambers and the third chamber performs pulse carburizing for carburizing diffusion. Since carburizing diffusion pulse carburizing is repeated, it is suitable for vacuum carburizing that requires deep carburizing for large or thick workpieces.
FIG. 7 shows a rough cycle time of the vacuum carburizing furnace configured as shown in FIG. 5 and another example to be used. Only three chambers are subjected to pulse carburizing diffusion. Since pulse carburizing for carburizing diffusion is repeated in three chambers, it is suitable for vacuum carburizing of relatively large workpieces or thick workpieces.
[Effects of the best mode for carrying out the invention]

かかる発明を実施するための最良の形態の構成により、本発明の真空浸炭炉による真空浸炭焼入れは、真空浸炭炉としての真空浸炭の高温処理による生産性の向上とＣＯ2 の排出なしの特徴に加え、真空浸炭炉の各室に予熱、昇温、浸炭、拡散及び降温の各機能を少なくとも２以上兼用するようにしたことにより、真空浸炭炉のうちの１室のみで、又は２室以上のみで上記各機能を実施し、兼用されたあとに残る残る各室は上記各機能を停止するので、大量生産時は各室本来の工程で操業し、中・少量生産時は生産量に応じた室を選択し操業させることが可能になり、炉一基で連続炉からバッチ式炉まで、大量から少量生産までカバーでき、生産量の変動、対象ワークの切換等に無駄がなく処理が可能になりかつ消費エネルギーも最小限に抑えることが可能になった。又対象ワークの変更に対しても炉内ワークをすべて払出すことなく条件変更が可能でありロスタイムが最小限にすることができフレキシビリティがある真空浸炭炉を提供するものとなった。 With the configuration of the best mode for carrying out the present invention, the vacuum carburizing and quenching by the vacuum carburizing furnace of the present invention is characterized by the improvement in productivity by high-temperature treatment of vacuum carburizing as a vacuum carburizing furnace and no CO 2 emission. In addition, since each chamber of the vacuum carburizing furnace has at least two or more functions of preheating, temperature rising, carburizing, diffusion, and temperature lowering, only one chamber of the vacuum carburizing furnace or only two or more chambers are used. The above-mentioned functions are performed in each room, and the remaining rooms after the combined use stop the above-mentioned functions, so that each room is operated in the original process at the time of mass production, and according to the production volume at the time of medium / small volume production. It is possible to select and operate a room, and it can cover from large to small volume production from a continuous furnace to a batch type furnace with a single furnace, and processing can be done without waste in fluctuations in production volume, switching of target workpieces, etc. And minimizing energy consumption Rukoto has become possible. In addition, the present invention provides a vacuum carburizing furnace which can change the conditions without changing all of the work in the furnace even when the target work is changed, minimizes the loss time, and has flexibility.

本発明の第１発明を実施するための最良の形態に使用する、チャージのサイクルタイム（以下サイクルタイムという）が1 〜8 時間くらい生産量に変動がある場合の、真空浸炭炉の構成を示すブロック図。The configuration of the vacuum carburizing furnace used when the charge cycle time (hereinafter referred to as the cycle time) varies in the production amount by about 1 to 8 hours used in the best mode for carrying out the first invention of the present invention is shown. Block Diagram. 図１の構成の真空浸炭炉の大まかなサイクルタイムと使用する各室の一例を示す。FIG. 2 shows an example of a rough cycle time of the vacuum carburizing furnace configured as shown in FIG. 1 and each chamber used. 本発明の第２発明を実施するための最良の形態に使用する、チャージのサイクルタイムが３〜８時間くらい生産量に変動がある場合の、真空浸炭炉の構成を示すブロック図。The block diagram which shows the structure of a vacuum carburizing furnace when the cycle time of charge used for the best form for implementing 2nd invention of this invention has a fluctuation | variation in a production amount about 3 to 8 hours. 図３の構成の真空浸炭炉の大まかなサイクルタイムと使用する各室の一例を示す。FIG. 4 shows an example of a rough cycle time of the vacuum carburizing furnace configured as shown in FIG. 3 and each chamber used. 図３とは異なる本発明第２発明を実施するための最良の形態に使用する、大形ワークまたは肉厚ワークに有効である場合の真空浸炭炉の構成を示すブロック図。The block diagram which shows the structure of the vacuum carburizing furnace used in the best form for implementing 2nd invention of this invention different from FIG. 3 when it is effective for a large sized workpiece or a thick workpiece. 図５の構成の真空浸炭炉の大まかなサイクルタイムと使用する各室の一例を示す。FIG. 6 shows an example of a rough cycle time of the vacuum carburizing furnace configured as shown in FIG. 5 and each chamber used. 図５の構成の真空浸炭炉の大まかなサイクルタイムと使用する別の一例を示す。FIG. 6 shows another example of the rough cycle time and the vacuum carburizing furnace configured as shown in FIG.

符号の説明Explanation of symbols

１室〜５室 予熱、昇温、浸炭、拡散及び降温を行う各室、又は予熱、昇温、浸炭、拡散 及び降温の機能を少なくとも２以上兼用する各室
６ 焼入れ室
７ トレイまたはバスケット
８ 搬送ローラ 1 to 5 rooms Preheating, temperature raising, carburizing, diffusion and temperature lowering, or each room having at least two functions of preheating, temperature raising, carburizing, diffusion and temperature lowering 6 Quenching room 7 Tray or basket 8 roller

Claims (4)

予熱室、昇温室、浸炭室及び拡散室又は浸炭兼拡散室、降温室及び焼入れ室を含む鉄合金部品の真空浸炭炉において、前記焼入れ室以外の少なくともいずれかの１室は、予熱、昇温、浸炭、拡散及び降温の各機能を少なくとも２以上兼用するようにしたことを特徴とする真空浸炭炉。 In a vacuum carburizing furnace for iron alloy parts including a preheating chamber, a heating chamber, a carburizing chamber and a diffusion chamber or a carburizing / diffusion chamber, a cooling chamber and a quenching chamber, at least one of the chambers other than the quenching chamber is preheated, heated A vacuum carburizing furnace characterized by combining at least two functions of carburizing, diffusion, and temperature lowering. 予熱室、昇温室、浸炭室及び拡散室又は浸炭兼拡散室、降温室及び焼入れ室を含む鉄合金部品の真空浸炭炉において、前記予熱室又は昇温室は予熱及び昇温の各機能を兼用し、前記昇温室、浸炭室及び拡散室又は浸炭兼拡散室、及び降温室の少なくともいずれかの１室は浸炭、拡散及び降温の各機能を少なくとも２以上兼用するようにしたことを特徴とする真空浸炭炉。 In a vacuum carburizing furnace for iron alloy parts including a preheating chamber, a heating chamber, a carburizing chamber and a diffusion chamber or a carburizing / diffusion chamber, a descending chamber and a quenching chamber, the preheating chamber or the heating chamber functions as both preheating and heating. The vacuum chamber is characterized in that at least one of the temperature raising chamber, the carburizing chamber and the diffusion chamber or the carburizing / diffusion chamber, and the descending greenhouse is used in combination with at least two functions of carburizing, diffusion and lowering. Carburizing furnace. 昇温室、浸炭室及び拡散室又は浸炭兼拡散室、降温室及び焼入れ室を含む鉄合金部品の真空浸炭炉において、前記焼入れ室以外の少なくともいずれかの１室は昇温、浸炭、拡散及び降温の各機能を少なくとも２以上兼用するようにしたことを特徴とする真空浸炭炉。 In a vacuum carburizing furnace for iron alloy parts including a heating chamber, a carburizing chamber and a diffusion chamber or a carburizing / diffusion chamber, a cooling chamber and a quenching chamber, at least one of the chambers other than the quenching chamber is heated, carburized, diffused and cooled. A vacuum carburizing furnace characterized in that at least two of these functions are also used. 昇温室、浸炭室及び拡散室又は浸炭兼拡散室、降温室及び焼入れ室を含む鉄合金部品の真空浸炭炉において、前記昇温室は予熱及び昇温の各機能を兼用しかつ複数以上のトレイ又はバスケットを挿入可能にし、前記昇温室、浸炭室及び拡散室又は浸炭兼拡散室、及び降温室の少なくともいずれかの１室は浸炭、拡散及び降温の各機能を少なくとも２以上兼用するようにしたことを特徴とする真空浸炭炉。 In a vacuum carburizing furnace for iron alloy parts including a temperature raising chamber, a carburizing chamber and a diffusion chamber or a carburizing / diffusion chamber, a cooling chamber and a quenching chamber, the temperature raising chamber is used for both preheating and temperature raising functions and a plurality of trays or The basket can be inserted, and at least one of the heating chamber, the carburizing chamber and the diffusion chamber or the carburizing / diffusion chamber, and the descending greenhouse has at least two functions of carburizing, diffusion and cooling. Vacuum carburizing furnace.
JP2003357352A 2003-10-17 2003-10-17 Vacuum carburizing furnace Withdrawn JP2005120439A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009046700A (en) * 2007-08-14 2009-03-05 Dowa Thermotech Kk Heat treatment method and heat treatment facility
WO2017036053A1 (en) * 2015-09-01 2017-03-09 唐山亚捷机械有限公司 Heating furnace for carburizing or carbonitriding
CN108866300A (en) * 2018-07-23 2018-11-23 台州市众达热处理有限公司 A kind of heat treatment process of quartering hammer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009046700A (en) * 2007-08-14 2009-03-05 Dowa Thermotech Kk Heat treatment method and heat treatment facility
WO2017036053A1 (en) * 2015-09-01 2017-03-09 唐山亚捷机械有限公司 Heating furnace for carburizing or carbonitriding
CN108866300A (en) * 2018-07-23 2018-11-23 台州市众达热处理有限公司 A kind of heat treatment process of quartering hammer

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